If you use Reddit mainly for news, blocking comments can be useful for focus. However, top-level comments by the author (OP) often have useful context and information.


While logged out of Reddit, using UBlock Origin, add the following to the My Filters tab in settings:

www.reddit.com##div[slot="commentMeta"]:not(:has(shreddit-comment-author-modifier-icon[op="true"])):upward(1)


While logged in, the following filter will only show comments (any depth) by the author:

www.reddit.com##div.Comment:not(span:has-text(/^op$/i))

More info: UBlock Wiki - Procedural cosmetic filters